It will definitely increase security and safety for people and it would help the police with their duty (finding a missing person or investigating a crime ) and also provide a sense of security for the general public also the government already has huge amount of information about their citizens why would someone be afraid of it if they committed no crime at all and what would hurt a person knowing the police (or a security department ) is knowing his location ? In fact he might feel more safe and secure knowing that if anything goes wrong he would be found .